Means for laterally limiting the roll gap of a rolling mill for the production of sheets or the like from metal particles



Sept. 5, 1967 K. CLAUS ET AL 3,339,394

MEANS FOR LATERALLY LIMITING THE ROLL GAP OF A ROLLING MILL FOR THE PRODUCTION OF SHEETS OR THE LIKE FROM METAL PARTICLES Filed Ja n. 26. 1965 I Z Sheets-Sheet 1 Fly Q1 Sept. 5, 19 67 K. CLAUS ET AL 3,339,394

MEANS FOR LATERALLY LIMITING THE ROLL GAP OF A ROLLING MILL FOR THE PRODUCTION OF SHEETS OR THE LIKE FROM 'METAL PARTICLES Filed Jan.. 26. 1965 2 Sheets-Sheet 2 Fig. 5

Fly. 4

United States Patent ABSTRACT OF THE DISCLOSURE Means for laterally limiting the roll gap in a rolling mill with ungrooved rolls for the production of sheets or the like from metal particles, by employing a stock-feeding device equipped with lateral walls projecting into the roll gap, at least the lower portion of the lateral walls being pivotally mounted or otherwise .angularly adjustable.

This invention relates to means for laterally limiting the roll gap of ungrooved rolls of a rolling mill for the production of simple sections, particularly of sheets (or plates) and strips, from metal particles In a known manner lateral limitation of the roll gap, for the formation of a roll groove, is eifected by means of the boundry walls of the rolled-stock feeding device, which project into the roll gap.

This method of forming the groove for the sheet or strip to be rolled has the advantage that the same pair of rolls can be used for any desired breadth of sheet or strip, only the supply breadth of the stock, that is, the dis. tance between the lateral boundary walls of the feeding device, having to be altered. The strips or sheets produced with such a groove, with either a high or a low roll pressure, do not in general have clean lateral edges. This is attributable to the fact that the lateral boundary walls do not extend through the roll gap, and therefore they can no longer influence the deformations that are produced in the compressed strip or sheet in the last portion of the roll gap. When working with a low roll pressure, only a small widening compression of the rolled stock occurs, which in general, particularly if the metal particles are rather large, is not suflicient to ensure a uniform filling of the sides of the groove, and therefore produces an uneven margin on the strip to be rolled. The margin is therefore rougher or smoother according to the size of the particles, so that in order to obtain clean edges a more or less wide edge has to be cut off afterwards.

With a heavy roll pressure a great widening of the stock occurs. The widening pressure is so great that the lateral boundary is exposed to high stresses, to which the latter is hardly equal, since it is only very narrow at its lower end, to correspond to the shape of the roll gap. Moreover at these high pressures the stock forces its way through the gap that subsists between the lateral boundary and the two rolls. By this means split and uneven strip edges occur, and erosion may be occasioned between the rolled stock and the lateral boundary.

The object of the present invention is to obviate the aforementioned defects as far as possible. The invention proposes that at a low roll pressure the lateral boundary should extend inwards in the direction of the roll gap in the gripping region of the rolls, and should extend outwards at .a high roll pressure. Consequently, at a low widening pressure, owing to the side walls bending inwards, a tapering of the groove in the direction of rolling is obtained. Here the boundary walls, in conjunction with the rolls, act like a drawing nozzle, so that the irregularities of the edges of the resulting strip are equalised.

The pressure acting upon the side walls owing to this form of the latter should not however be so great that the stock is forced through crevices between the side walls and the rolls. When rolling with relatively large widening, therefore, the side walls will be somewhat less directed inwards in the region of consolidation, letting them run parallel, or even directing them outwards, so that a large proportion of the widening pressure is taken up by friction between the rolls and the stock, and only the lateral pressure requisite for smoothing the edges of the strip still acts from the side walls upon the stock.

In a further development of the invention the lateral boundary walls are adjustably constructed. This has the special advantage of enabling the apparatus to be in a simple manner adapted to the particular rolling conditions, and, in addition, of compensating for the wear occurring on the side walls, and for a lateral deflection, arising in consequence of excessive stressing, even when the boundary walls are extending in a parallel position.

Two constructional examples of the invention are illustrated in the accompanying drawings, in which:

FIGURE 1 shows a view looking in the direction B in FIGURE 2;

FIGURE 2 shows a view looking in the direction A in FIGURE 1;

FIGURE 3 shows a section on the line III-III in FIG- URE 2;

FIGURE 4 shows a view corresponding to FIGURE 3 of a feeding device, with a pivoted appliance for the lateral limitation of the roll gap;

FIGURE 5 shows a view looking in the direction of the arrow C in FIGURE 4.

In FIGURES 1 to 3, 1 denotes the smooth rolls, the roll gap 2 of which is bounded on both sides by the lateral boundary walls 3 of the feeding device 4, for the formation of a roll groove 5. In the gripping region 6 of the rolls, the ends 7, 7' are bent inwards or outwards (represented by dotted lines), so that the widening. pressure can be increased or diminished for the purpose of obtaining a clean edge of the strip or sheet.

In FIGURE 4, 8 denotes the feeding device, to the side walls 9 of which lugs 10 are welded, to which, by means of bolts 11, the Walls 12 that form the lateral boundary of the roll groove are pivoted. According to the conditions of rolling, the two walls 12, arranged on levers 14, are progressively adjusted, by the rodding 13, inwards, parallel or outwards relatively to one another. As will be seen from FIGURE 5, the operative surfaces of the walls 12 extend beyond the gripping range of the rolls 14.

We claim:

1. In a rolling mill with ungrooved rolls for the production of sheets, plates, strips and other simple sections from metal particles, means for laterally limiting the roll gap, comprising: a stock-feeding device having adjustable lateral walls projecting into the roll gap, at least the lower part of the lateral walls, where they project into the roll gap, being adapted to be deflected inwards, that is, towards the opposite lateral wall, when the roll pressure is low, .and to be deflected outwards when the pressure is high.

2. Means for laterally limiting the roll gap in a rolling mill as claimed in claim 1, each of the boundary walls,

J as a whole, being adjustably pivoted to the stock-feeding device.

3. Means for laterally limiting the roll gap in a rolling mill as claimed in claim 2, further comprising rodding for angularly adjusting the boundary walls, jointly and pro- 5 gressively, inwards and outwards, about their pivots.

4. Means for laterally limiting the roll gap in a rolling mill as claimed in claim 1, the said adjustable lateral Walls being the side walls of the stock-feeding device itself.

4 References Cited UNITED STATES PATENTS 238,105 2/1881 Gearing 8051 1,558,271 10/1925 Newell 8051 2,513,541 7/1950 Winegar et al. 80-51 WILLIAM W. DYER, 111., Primary Examiner.

GERALD A. DOST, Examiner. 

1. IN A ROLLING MILL WITH UNGROOVED ROLLS FOR THE PRODUCTION OF SHEETS, PLATES, STRIPS AND OTHER SIMPLE SECTIONS FROM METAL PARTICLES, MEANS FOR LATERALLY LIMITING THE ROLL GAP, COMPRISING: A STOCK-FEEDING DEVICE HAVING ADJUSTABLE LATERAL WALLS PROJECTING INTO THE ROLL GAP, AT LEAST THE LOWER PART TO THE LATERAL WALLS, WHERE THEY PROJECT INTO THE ROLL GAP, BEING ADAPTED TO BE DEFLECTED INWARDS, THAT IS, TOWARDS THE OPPOSITE LATERAL WALL, WHEN THE ROLL PRESSURE IS LOW, AND TO BE DEFLECTED OUTWARDS WHEN THE PRESSURE IS HIGH. 